Guenther Steiner is an unlikely sort of hero. Until January this year, he was the high-profile team principal of a low-profile motor-racing team. His reputation and global popularity is chiefly down to being a star of the Netflix series Formula 1: Drive to Survive, in which he has become nothing less than a legend due to, in his own words, ‘having no filter and not giving a s—t about what people think of me’.